I'm not sure if it's even feasible to do this, but since it's been requested multiple times, someone (cough) would have to take a look...

Roadmap:

• Research: Does the fishing mount drop everywhere?
• Research: What is the drop rate? Is it even worth tracking?
• Task: Add the mount

Bumping this up in priority because a user has submitted an import that I could probably add (and refine later if need be): https://www.wowace.com/projects/rarity/issues/336

Added in edd21ea.